At 6, Koby Blunt
Is Retiring at the Top
In Mutton Bustin'

WINCHESTER, Idaho -- Koby Blunt gently lowered himself into the rodeo chute, climbing down the white fencing until he straddled his opponent: 250 pounds of bleating ovine.

He wedged his right hand under the riding rope wrapped around the sheep's chest, squeezed his legs tight around its shaggy flanks and positioned his boots, spurs at the ready. He lifted his left arm into the air and instructed his assistants: "I'm ready, boys,...